//引入axios
import axios from 'axios'
import store from '../store'
import router from '../router'
import Qs from 'qs'
import {
  Message
} from 'element-ui';
import {
  getToken,
  getName,
  setToken,
  removeToken
} from '@/utils/auth'

let cancel, promiseArr = {}
const CancelToken = axios.CancelToken;
//异步请求前在header里加入token
axios.interceptors.request.use(
  config => {
    if (config.url === '/api/UserInfo/GenerateAccessToken') { //如果是登录和注册操作，则不需要携带header里面的token
    } else {
      if (getToken()) {
        config.headers.Authorization = 'Bearer ' + getToken();
        // config.headers.Authorization = getToken();
      }
    }
    return config;
  },
  error => {
    return Promise.reject(error);
  });
//请求拦截器
axios.interceptors.request.use(config => {
  //发起请求时，取消掉当前正在进行的相同请求
  if (promiseArr[config.url]) {
    promiseArr[config.url]('操作取消')
    promiseArr[config.url] = cancel
  } else {
    promiseArr[config.url] = cancel
  }
  return config
}, error => {
  return Promise.reject(error)
})

//响应拦截器即异常处理
axios.interceptors.response.use(response => {
  return response
}, err => {
  if (err && err.response) {
    switch (err.response.status) {
      case 400:
        err.message = '错误请求'
        break;
      case 401:
        err.message = '未授权，请重新登录'
        removeToken();
        router.push('/login');
        break;
      case 403:
        err.message = '拒绝访问'
        break;
      case 404:
        err.message = '请求错误,未找到该资源'
        break;
      case 405:
        err.message = '请求方法未允许'
        break;
      case 408:
        err.message = '请求超时'
        break;
      case 500:
        err.message = '服务器端出错'
        break;
      case 501:
        err.message = '网络未实现'
        break;
      case 502:
        err.message = '网络错误'
        break;
      case 503:
        err.message = '服务不可用'
        break;
      case 504:
        err.message = '网络超时'
        break;
      case 505:
        err.message = 'http版本不支持该请求'
        break;
      default:
        err.message = `连接错误${err.response.status}`
    }
  } else {
    err.message = "连接到服务器失败"
  }
  Message.error(err.message)
  return Promise.resolve(err.response)
})

// axios.defaults.baseURL = 'http://192.168.1.20:8088'
axios.defaults.baseURL = 'http://td.api.580tequan.com/'
//设置默认请求头
axios.defaults.headers = {
  'Content-Type': 'application/x-www-form-urlencoded'
  // 'Content-Type': 'application/json'
}
axios.defaults.timeout = 10000

export default {
  //get请求
  get(url, param) {
    return new Promise((resolve, reject) => {
      axios({
        method: 'get',
        url,
        params: param,
        cancelToken: new CancelToken(c => {
          cancel = c
        })
      }).then(res => {
        resolve(res)
      })
    })
  },
  //post请求
  post(url, param) {
    return new Promise((resolve, reject) => {
      axios({
        method: 'post',
        url,
        data: Qs.stringify(param),
        cancelToken: new CancelToken(c => {
          cancel = c
        })
      }).then(res => {
        resolve(res)
      })
    })
  }
}
